When I start the client, in the client-side Xpra menu, Feature submenu, OpenGL is not checked and under Scaling submenu, none of the entries are checked (even "None" is not checked).

Even if I add these lines:

opengl=True
desktop-scaling=None

In the client-side Xpra menu, Features submenu, the OpenGL is not checked and in Scaling subsubmenu the None is not checked. Had it in my mind, both these options would help performance, and the client menu was a way to confirm if they are set.
Thanks.